Publication

Behaviour of UHPFRC-RC composite beams subjected to combined bending and shear

Eugen Brühwiler
2010
Conference Papers

Abstract

An emerging technique for strengthening of reinforced concrete (RC) slabs is to add a layer of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC) with steel rebars as an external tensile flexural reinforcement. This paper presents the results of an experimental campaign to study the structural response of composite UHPFRC-RC beams. The resistance of the UHPFRC layer subjected to combined tension and bending controls the structural response. The results show that the UHPFRC layer increases the member shear strength without impairing the deformation capacity. The Critical Shear Crack Theory is used to show the enhanced response of the composite beams.

Official source

https://infoscience.epfl.ch/entities/publication/5bace087-9cb1-459b-a3b4-35cb2284e5c2

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Eugen Brühwiler
2010
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5bace087-9cb1-459b-a3b4-35cb2284e5c2

About this result

Related concepts (25)

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Strength of materials

The field of strength of materials (also called mechanics of materials) typically refers to various methods of calculating the stresses and strains in structural members, such as beams, columns, and shafts. The methods employed to predict the response of a structure under loading and its susceptibility to various failure modes takes into account the properties of the materials such as its yield strength, ultimate strength, Young's modulus, and Poisson's ratio.

Concrete

Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that is easily poured and molded into shape.

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Behaviour of UHPFRC-RC composite beams subjected to combined bending and shear

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